NutriCool for Ruminants

4 January 2016

The summer is a challenging period for both beef and dairy cows. During periods of high temperatures, especially in combination with high humidity it is especially important for cows to maintain normal body temperature and thus maintain normal milk production, growth, fertility and milk quality. Responding successfully to the consequences of hot and humid weather may be one of the most important areas for improving profitability of dairy and beef operations during summer.

The combination of temperature and humidity is expressed as the Temperature Humidity Index (THI). Some cows will experience difficulty to regulate their body temperature from THI 68 (roughly 22°C (72°F) at 50% humidity). Milk production may drop as much as 30% when THI exceeds 72 (approximately 25°C (77°F)).